Thoughtworks Technology Radar April 2026 issue moved LangGraph out of Adopt. It is an architecture argument:

Instead of starting with a rigid graph and a massive shared state, this approach favors simple agents communicating through code execution, with graph structures added later when needed. … Because each agent only has access to the state it needs, reasoning, testing and debugging become easier.

Two claims are doing the work there:

Communicate through code execution, not a shared mutable blackboard.

Each agent gets only the state it needs, not a view into one global object.